Metalworking with an aqueous synthetic lubricant containing polyoxypropylene-polyoxyethylene-polyoxypropylene block copolymers
AssigneeAluminum Company of America
InventorJoseph T. Laemmle
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Abstract
A method of metalworking including the step of applying to a metal object a synthetic aqueous lubricant composition. The composition comprises a water-soluble mixture of polyoxypropylene-polyoxyethylene-polyoxypropylene block copolymers, a water-soluble carboxylic acid, a water-soluble alkanolamine and water. The metalworking method preferably includes a step of either hot rolling or cold rolling. The method is especially suitable for use on aluminum and aluminum alloy material.
Claims20
A method of metalworking comprising the steps of
- (a) applying to a metal object a synthetic aqueous solution lubricant composition
- (1) about 1.0-20 wt% of a water-soluble mixture of polyoxyethylene-polyoxypropylene block copolymers containing a single polyoxyethylene chain and two polyoxypropylene chains attached to the polyoxyethylene chain, the average molecular weight of the polyoxypropylene chains in the mixture being at least 900 and the polyoxyethylene chains in the mixture constituting about 10-80 wt% of the mixture,
- (2) about 0.5-10 wt% of a water-soluble carboxylic acid of the general formula
- C.sub.m H.sub.2m-n-r+2 (COOH).sub.r
- where m is an integer from 11 to 36, n=0, 2, 4 or 6 and r=1 or 2,
- (3) about 0.5-10 wt% of a water-soluble alkanolamine, and
- (4) water;
- and
- (b) performing a metalworking operation on the metal object.
A method of hot rolling or cold rolling a metal object comprising aluminum or an aluminum alloy, said method comprising the steps of
- (a) applying to the object a synthetic aqeuous solution lubricant composition comprising
- (1) about 2.5-10 wt% of a water-soluble mixture of polyoxyethylene-polyoxypropylene block copolymers containing a single polyoxyethylene chain and two polyoxypropylene chains attached to the polyoxyethylene chain, the average molecular weight of the polyoxypropylene chains in the mixture being about 1000 to 3100 and the polyoxyethylene chains in the mixture constituting about 10-80 wt% of the mixture,
- (2) about 0.5-5 wt% of a saturated or monounsaturated C.sub.12 to C.sub.20 monocarboxylic acid,
- (3) about 0.5-3 wt% of a water-soluble alkanolamine, the alkanolamine being present in sufficient concentration to provide at least one amine group for each carboxyl group in said acid,
- (4) a non-silicone antifoam agent, and
- (5) water;
- and
- (b) hot rolling the object at a temperature of about 450.degree.-1000.degree. F. or cold rolling the object at about ambient temperature to 450.degree. F.
Dependencies are inferred from the claim text.